function jqlazyload() {
  let maxHeight = window.innerHeight || document.documentElement.clientHeight
  let maxScrollTop = document.body.scrollTop || document.documentElement.scrollTop
  let totalShowHeight = maxHeight + maxScrollTop
  let imgsObj = $('img')
  imgsObj.each((i,item)=>{
    if(item.offsetTop>totalShowHeight){
      item.src = $(item).attr('data-original')
    }
  })
}
